For the chili:
In the bottom of a large pot, season the ground beef with 4 teaspoons salt and 4 teaspoons pepper and cook until thoroughly browned. Do not crowd the bottom of the pan. Remove the beef and cook the onions, carrots and celery in the remaining fat until soft. Add the garlic and cook for 1 minute before adding the browned beef, chocolate, bay leaves
, cumin, coriander, oregano, cayenne, tomato paste
, water, and vinegar. Cook for half an hour. Season to taste.